<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>acreage </title>
    <script >
        alert("求矩形面积：")
        let high=prompt("请数入高");
        let width=prompt("请数入宽");
        document.write("矩形的面积为:"+(high*width))
    </script>
</head>
<body>

</body>
</html>